Lie on your stomach with your bodyweight supported by your forearms; your arms should be at a 90 degree angle. Get up on your toes like you are doing a push up. Then raise your body up until your back is completely straight. You should be able to draw a straight line from your head all the way down to your heels. Hold this position and squeeze your abs. A good start would be to hold this position for 30 seconds and then repeat 3-5 times. You should strive to hold this position for a longer time period each time you perform this exercise.

Do not let your stomach sag down and do not allow your butt to rise up into the air. Hold your body tight so that you work your abs. Your shoulders are only used to stabilize your body.